Decomposition of grain-corn residues (Zea mays L.):: A litterbag study under three tillage systems
Decomposition of grain-corn residues (Zea mays L.):: A litterbag study under three tillage systems
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DOI：
10.4141/s01-013
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发表时间：
2002-05-01
影响因子：
1.7
通讯作者：
Madramootoo, CA
中科院分区：
文献类型：
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作者：
Burgess, MS;Mehuys, GR;Madramootoo, CA
Burgess，M.美国，Mehuys，G. R.和Madramootoo，C. A. 2002.谷物-玉米残留物（玉米）的分解：三种耕作制度下凋落物袋的研究。可以的.《土壤科学杂志》82：127-138。进行这项研究，以获得在加拿大东部条件下的谷物玉米残留物的垃圾袋分解数据，以确定耕作和/或深度对残留物质量损失的影响，并比较不同的植物部分，构成残留物（穗轴，茎，叶，外壳）的分解模式。将含有残留物的网袋埋在或留在免耕、少耕和常规耕作下的谷物-玉米地块的土壤表面，并在2年的时间内取回。分别获得每个植物部分的数据，然后用于计算除穗轴外所有残留物的合并总量。或仅用于茎和叶，以便于与基于不同残留物混合物的研究进行比较，掩埋残留物比表面残留物损失更快。尽管越冬温度低，残留物质量大幅下降之间的位置在11月和5月中旬的第一次采样。在此期间，表层垃圾袋残留物损失了初始质量的20%，埋在5cm处的残留物损失了33%，埋在20 cm处的残留物损失了41%。5月中旬至10月中旬的相应跌幅分别为21%、42%和32%。质量损失最快的埋叶，外壳和茎（89-98%的损失在2年）和最慢的表面穗轴（32%的损失在2年）。
Burgess, M. S., Mehuys, G. R. and Madramootoo, C. A. 2002. Decomposition of grain-corn residues (Zea mays L.): A litterbag study under three tillage systems. Can. J. Soil Sci. 82: 127-138. This study was undertaken to obtain litterbag decomposition data for grain-corn residues in eastern Canadian conditions, to determine tillage and/or depth effects on residue mass loss, and to compare decomposition patterns for the different plant parts that constitute the residue (cobs, stems, leaves, husks). Mesh bags containing residues were buried or left on the soil surface in grain-corn plots under no-till, reduced tillage, and conventional tillage, and retrieved over a 2-yr period. Data were obtained separately for each plant part, then used to calculate pooled totals for all residues combined, for all residues except cobs. or for stems and leaves only, to facilitate comparison with studies based on different residue mixes, Buried residues lost mass faster than surface residues. Despite low overwinter temperatures, residue mass decreased substantially between placement in November and first sampling in mid-May. Surface litterbag residues lost 20% of initial mass during this period, residues buried at 5 cm lost 33% and those at 20 ern lost 41%. Corresponding losses from mid-May to mid-October were 21, 42 and 32%, respectively. Mass loss was fastest for buried leaves, husks and stems (89-98% loss in 2 yr) and slowest for surface cobs (32% loss in 2 yr).